Preseln.普雷塞尔Presabbr.主席；总统(=President)abbr.现在(=present)preservation media保存溶液prestressed strand钢绞线prestressed girder预应力梁prescapular fossae[医] 肩胛下窝preservice teacher职前教师presbyopic glasses老花镜prestressed losing预应力损失preserving urethra保留尿道presteaming vessel预汽蒸室presystolic murmur收缩前杂音